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A network of devices that created hyperspace wormholes, hypergates used an unknown technology to circumvent mass shadows, allowing near-instant travel through space and to other hypergates.[source?] Hypergates had a variety of sizes and functionality[1] with such shapes typically being freestanding accessways, gateways,[2] or archways.[1] Those that activated the technology and stepped through the threshold were instantly transported through hyperspace itself to an opposing hypergate[1] terminus at another location.[2] Such locations tended to vary as a receiving hypergate was capable of being located on the planet of origin or another world entirely[2] with rumors of this latter fleet known of variant gates that were capable of sending entire starships across the galaxy.[1]

They were considered a significant development of Gree technology.[2] Amongst the Gree, the hypergates were venerated by their culture as sacred relics of technological works of art. Their civilization had long claimed that only the elite Gatemasters of their Operator caste were capable of activating a hypergate though this may had been a cultural bias.[1] They became examples of lost technology that the Gree refused to duplicate.[2]

These devices were constructed countless millennia ago in a time known to the Gree as "the most ancient and forgotten days". In time, a number of these devices were spread across the space of the Gree Enclave with dozens once connecting the myriad of Gree worlds.[1] In the aftermath of their creation, other forms of personal interplanetary travel became obsolete though starships were still used on occasion.[2] As Gree society declined, their ability and willingness to duplicate their technology atrophied. The secret of building hypergate technology was known only to Gree masters, who operated their remaining constructor devices. [source?] After centuries of neglect, only ruins of them remained behind and their existence was a closely guarded secret.[2] A major hub of the hypergate system was the Grand Hypergate on Asation, but due to the Asation gatemaster's inability to use it, it was essentially little more than a historical monument. [source?] By this point, not even the Gree were able to fully understand the mysterious hypergate technology.[1] On Tython, the early Je'daiiTythans discovered the Old City that had been long ago abandoned and rumors persisted of a working hypergate present in the settlement but none had been discovered.[3]

In the post-Cold War period, the Dread Masters directed their servant Kephess to the Gree world of Asation. Once there, the twisted Trandoshan activated the hypergate to an unknown part of space and allowed countless unknown terrors to ravage the planet. In response, the the Gree sent their ambassadors to both the Galactic Republic and the Sith Empire to gather their aid. A group of spacers from either faction later traveled to Asation where they battled the creatures besieging the planet and confronted Kephess who was ultimately killed. However, the opened hypergate allowed a monstrous being to enter onto the planet which the spacers had to force back into the hyperspace threshold and remove its hold from the gate thus defeating it.[4]